Math.cbrt()
The Math.cbrt()
function returns the cube root of a
number, that is
Syntax
Math.cbrt(x)
Parameters
- x
-
A number.
Return value
The cube root of the given number.
Description
Because cbrt()
is a static method of Math
, you always use it
as Math.cbrt()
, rather than as a method of a Math
object you
created (Math
is not a constructor).
Polyfill
For all , have so this can be emulated by the following function:
if (!Math.cbrt) {
Math.cbrt = (function(pow) {
return function cbrt(x){
// ensure negative numbers remain negative:
return x < 0 ? -pow(-x, 1/3) : pow(x, 1/3);
};
})(Math.pow); // localize Math.pow to increase efficiency
}
Examples
Using Math.cbrt()
Math.cbrt(NaN); // NaN
Math.cbrt(-1); // -1
Math.cbrt(-0); // -0
Math.cbrt(-Infinity); // -Infinity
Math.cbrt(0); // 0
Math.cbrt(1); // 1
Math.cbrt(Infinity); // Infinity
Math.cbrt(null); // 0
Math.cbrt(2); // 1.2599210498948732
Specifications
Specification |
---|
ECMAScript Language Specification # sec-math.cbrt |
Browser compatibility
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